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Nederlandse

norm Kathodische bescherming - Uitwendige organische bekleding voor de bescherming tegen corrosie van in de bodem of in het water gelegde stalen leidingen die samen met kathodische bescherming worden gebruikt - Wikkelbanden en krimpbare materialen

Cathodic protection - External organic coatings for the corrosion protection of burted or immersed steel pipelines used in conjunction with cathodic protection - Tapes and shrinkable materials

Als Nederlandse norm is aanvaard: - EN 12068 :1998

NEN-EN 12068

september 1998

ICS 2 3 . 0 4 0 . 9 9 ; 2 5 . 2 2 0 . 6 0

Vervangt NEN 6 9 0 7 : 1 9 7 9 ; NEN 6 9 0 9 : 1 9 8 0 ; NEN-EN 1 2 0 6 8 : 1 9 9 6 2 e Ontw.

Normcommissie 3 1 0 0 0 4 "Transportleidingen"

Auteursrecht voorbehouden. Behoudens uitzondering door de wet gesteld mag zonder schriftelijke toestemming van het Nederlands Normalisatie-instituut niets uit deze uitgave worden verveelvoudigd en/of openbaar gemaakt door middel van fotokopie, microfilm, opslag in computerbestanden of anderszins, hetgeen ook van toepassing is op gehele of gedeeltelijke bewerking.

Het Nederlands Normalisatie-instituut is met uitsluiting van ieder ander gerechtigd de door derden verschuldigde vergoedingen voor verveelvoudiging te innen en/of daartoe in en buiten rechte op te treden, voor zover deze bevoegdheid niet is overgedragen c.q. rechtens toekomt aan de Stichting Reprorecht.

Hoewel bij deze uitgave de uiterste zorg is nagestreefd, kunnen fouten en onvolledigheden niet geheel worden uitgesloten. Het Nederlands Normalisatie-instituut en/of de leden van de commissies aanvaarden derhalve geen enkele aansprakelijkheid, ook niet voor directe of indirecte schade, ontstaan door of verband houdende met toepassing van door het Nederlands Normalisatie-instituut gepubliceerde uitgaven.

Nederlands Normalisatie-instituut

C1998 Nederlands Normalisatie-instituut Kalfjeslaan 2, Postbus 5059, 2600 GB Delft Telefoon (015) 2 690 390, Fax (01 5) 2 690 1 90

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Dit document is een voorbeeld van NEN / This document is a preview by NEN

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NEN-EN 12068

Nederlands Voorwoord

Voor de in deze norm vermelde normatieve verwijzingen bestaan in Nederland de volgende equivalenten:

Vermelde norm

prEN 1427:1994

EN ISO 527-3:1995

EN ISO 8503-2

EN ISO 9000-1

EN ISO 9000-2

EN ISO 9001

EN ISO 9002

EN ISO 9003

ISO/DIS 188

ISO 1523

ISO 2808

ISO 2811:series

Nederlandse norm

NEN-EN 1427:1 9940ntw.

NEN-EN-ISO 527-3:1995

NEN-EN-ISO 8503-2

NEN-EN-ISO 9000-1

NEN-EN-ISO 9001

NEN-EN-ISO 9002

NEN-EN-ISO 9003

NEN-ISO 1523

NEN-ISO 2811:reeks

Titel

Aardolieprodukten - Bitumen en bitumineuze bindmiddelen - Bepaling van het verwekingspunt - Ring- en kogelmethode

Kunststoffen - Bepaling van de trekeigenschappen -Deel 3: Beproevingsomstandigheden voor folies en platen

Voorbereiding van oppervlakken van staal voor het aanbrengen van verf en aanverwante Produkten -Eigenschappen van gestraalde oppervlak van staal -Deel 2: Methode voor de bepaling van de ruwheid van gestraalde oppervlakken van staal - Methode met vergelijkingsmonsters

Normen voor de kwaliteitszorg en kwaliteitsborging -Deel 1 : Richtlijnen voor de keuze en de toepassing

Kwaliteitssystemen - Model voor de kwaliteitsborging bij het ontwerpen, ontwikkelen, het vervaardigen, het installeren en de nazorg

Kwaliteitssystemen - Model voor de kwaliteitsborging bij het vervaardigen, het installeren en de nazorg

Kwaliteitssystemen - Model voor de kwaliteitsborging bij de eindkeuring en de beproeving

Verf, vernis, aardolie en verwante Produkten - Bepaling van het vlampunt - Evenwichtsmethode met gesloten kroes

Verven en vernissen - Bepaling van de dichtheid

ISO 3303:1990

ISO 3801

ISO 4591

ISO 4593

ISO 4626

ISO 4892-1

NEN-ISO 3801

NEN-ISO 4591

NEN-ISO 4593

Produkten en systemen voor de bescherming en reparatie van betonconstructies - Beproevingsmethoden - Bepaling van het gehalte aan vluchtige en niet-vluchtige bestanddelen

Weefsels - Bepaling van de massa per lengte en de massa per oppervlakte

Kunststoffilm en -plaat - Bepaling van de gemiddelde dikte van een proefstuk en de gemiddelde dikte en de hoeveelheid van een rol, met behulp van gravimetrische methoden (gravimetrische dikte)

Kunststoffilm en -plaat - Bepaling van de dikte door mechanisch aftasten

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NEN-EN 12068

Beproevingsapparatuur voor rubber en kunststoffen Trek-, buig- en druktypen (constante loopsnelheid) -Beschrijving

ISO 7254

ISO 8501-1

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EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

EN 12068

August 1998

ICS 23.040.99; 25.220.60

Descriptors: metal protection, corrosion prevention, electrochemical corrosion, organic coatings, adhesive tapes, cathodic protection, buried pipes, submerged construction, steel tubes, specifications, operating requirements, quality, conformity tests, tests

English version

Cathodic protection - External organic coatings for the corrosion protection of buried or immersed steel pipelines used in

conjunction with cathodic protection - Tapes and shrinkable materials

Protection cathodique - Revêtements organiques extérieurs pour la protection contre la corrosion de tubes en acier enterrés ou immergés en conjonction avec la protection

cathodique - Bandes et matériaux rétractables

Kathodischer Korrosionsschutz - Organische Umhüllungen für den Korrosionsschutz von in Böden und Wässern verlegten Stahlrohrleitungen im Zusammenwirken mit

kathodischem Korrosionsschutz - Bänder und schrumpfende Materialien

This European Standard was approved by CEN on 18 July 1998.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

Central Secretariat: rue de Stassart, 36 B-1050 Brussels

© 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.

Ref. No. EN 12068:1998 E

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EN 12068:1998

Contents

Page Page

Foreword 3 Introduction 3 1 Scope 4 2 Normative References 4 3 Definitions 5 4 Classification and designation 7 5 Requirements 9 6 Quality 14

Annex A (normative) Tape strength, elongation at break, modulus at 10 % elongation, bursting strength 16

Annex В (normative) Peel strength layer to layer 18

AnnexC (normative) Peel strength to pipe surface and factory coating 20

Annex D (normative) Lap shear strength 21

Annex E (normative) Thermal ageing resistance 23

Annex F (normative) Ultraviolet irradiation resistance 26

Annex G (normative) Indentation resistance

Annex H (normative) Impact resistance . . .

27

29

Annex J (normative) Specific electrical insulation resistance .. 32

Annex К (normative) Cathodic disbondment resistance 33

Annex L (informative) Saponification value 36

Annex M (normative) Microbiological resistance 37

Annex N (normative) Low temperature flexibility 40

Annex P (normative) Low temperature unrolling test 45

Annex Q (normative) Drip resistance of petrolatum tapes 46

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РадеЗ EN 12068:1998

Foreword

This European Standard has been prepared by Technical Committee CEN/TC 219 "Cathodic protection", the secretariat of which is held by BSI.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 1999, and conflicting national standards shall be withdrawn at the latest by February 1999.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.

Introduction This European Standard gives requirements for organic coatings based on tapes or shrinkable materials for corrosion protection of buried or immersed pipelines, used in conjunction with cathodic protection.

This European Standard has been taken over from WG 6 of CEN/TC 262/SC 2 "Cathodic Protection", the secretariat of which is held by DIN. There is a liaison between CENЯC 262/SC 2/WG 6 and ECISSA"C 29/SC 4, to harmonize the standards prepared in both committees.

This is primarily a functional standard giving the requirements for the material properties necessary to ensure the function of the coating.

To ensure compatibility of the organic coatings with cathodically protected pipelines, tests of cathodic disbonding resistance at continuous operating temperature are specified. Test requirements are given for 23 °C but due to limited data available to WG 6 it is intended that values for higher temperatures will be established after five years.

Attention is drawn to the fact that degradation of the properties of a coating may occur following attack from microbiological matter. Work is to be undertaken in Europe to produce a suitable test method but this may take several years. It is considered that a burial in soil is the only satisfactory test method. The described test method is proposed for the interim period of five years.

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EN 12068:1998

1 Scope This standard specifies the functional requirements and test methods for external organic coatings based on tapes or shrinkable materials to be used for corrosion protection of buried and immersed steel pipelines in conjunction with cathodic protection.

It classifies coatings by increasing mechanical resistance and operating temperatures. Coatings for special installation conditions are also considered. A comprehensive classification of coatings in relation to functional requirements is defined. Tapes and shrinkable materials which meet the requirements of these classes can belong to various types defined in this standard.

This European standard is not applicable to special applications in off-shore and stress loads caused by frequent temperature changes.

Specifications of fillers are outside the scope of this European standard.

2 Normative References This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies.

prEN1427 Petroleum products - Bitumen and bituminous binders - Determination of the softening point - Ring and ball method

EN ISO 527-3:1995 Plastics - Determination of tensile properties - Part 3: Test conditions for films and sheets (ISO/DIS 527-3:1995)

EN ISO 8503-2 Preparation of steel substrates before application of paints and related products - Surface roughness characteristics of blast-cleaned steel substrates - Part 2: Method for the grading of surface profile of abrasive blast-cleaned steel - Comparator procedure (ISO 8503-2:1988)

EN ISO 9000-1 Quality management and quality assurance standards - Guidelines for selection and use

EN ISO 9000-2 Quality management and quality assurance standards - Generic guidelines for the application of ISO 9001, ISO 9002 and ISO 9003

EN ISO 9001 Quality systems - Model for quality assurance in design/development, production, installation and servicing

EN ISO 9002 Quality systems - Model for quality assurance in production, installation and servicing

EN ISO 9003 Quality systems - Model for quality assurance in final inspection and test

ISO/DIS 188 Rubber, vulcanised - Accellerated ageing and heat resistance tests

ISO 1523 Paints, varnishes, petroleum and related products - Determination of flashpoint - Closed cup equilibrium method

ISO 2808 Paints and varnishes - Determination of film thickness

ISO 2811 Paints and varnishes - Determination of density

ISO 3251 Paints and varnishes - Determination of non-volatile matter of paints, varnishes and binders for paints and varnishes

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EN 12068:1998

ISO 3303:1990 Rubber- or plastics-coated fabrics - Determination of bursting strength

ISO 3801 Textiles - Woven fabrics - Determination of mass per unit length and mass per unit area

ISO 4591 Plastics - Film and sheeting - Determination of average thickness of a sample, and average thickness and yield of a roll, by gravimetric techniques (gravimetric thickness)

ISO 4593 Plastics - Film and sheeting - Determination of thickness by mechanical scanning

ISO 4626 Volatile organic liquids - Determination of boiling range

ISO 4892-1 Plastics - Methods of exposure to laboratory light sources - Part 1 : General guidance

ISO 4892-2 Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc sources

ISO 5893 Rubber and plastics test equipment - Tensile, flexural and compression types (consistant rate of traverse) -Description

ISO 7254 Paints and varnishes - Assessment of natural spreading rate - Brush application

ISO 8501-1 Preparation of steel substrates before application of paints and related products - Visual assessment of surface cleanliness - Part 1 : Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings

3 Definitions

For the purposes of this standard, the following definitions apply :

3.1 external organic coatings

3.1.1 coating

One or several layers of materials applied to the pipe in the form of tapes (spiral or "cigarette" wrapping), shrinkable materials (as delivered or constituted just prior to application) or repair materials.

Coatings can consist of one or more basic types of coating materials as described in 3.2.

Primer(s) and/or filler(s) can be used in conjunction with these coating materials to improve adherence or facilitate application.

3.1.2. inner layer

Coating primarily constituted to protect the pipe surface from corrosion damage.

3.1.3 outer layer

Coating primarily constituted to protect the inner layer from mechanical stresses.

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EN 12068:1998

3.2 basic types of coating materials

3.2.1 petrolatum tape (cold applied) Corrosion protection tape consisting of a synthetic reinforcement coated on both sides with a semi-solid petrolatum compound mouldable at ambient temperature. It may contain an additional backing film.

3.2.2 bituminous tape (hot applied)

Corrosion protection tape consisting of glass or synthetic reinforcement coated on both sides with a bituminous compound.

3.2.3 polymeric tape (cold or hot applied)

Corrosion protection tape consisting of a compound highly adhesive to steel and generally bonded to a flexible polymer film and may contain a synthetic reinforcement. These tapes can be subdivided into the following types:

3.2.3.1 laminate polymeric tape

Corrosion protection tape consisting of a flexible polymer film, coated on one or both sides with an adhesive compound. The adhesive compound may be reinforced with synthetic fibres.

3.2.3.2 reinforced polymeric tape

Corrosion protection tape consisting of a synthetic reinforcement, coated on both sides with an adhesive compound and containing an additional polymer film.

3.2.3.3 low strength polymeric tape

Corrosion protection tape consisting only of an adhesive compound. It may contain a flexible polymer film (thickness ^0,15 mm) to avoid overstretching during application.

3.2.4 shrinkable material

Corrosion protection product consisting of a polymer backing capable of controlled shrinking, generally precoated on one side with an adhesive. The polymer backing can be reinforced.

Shrinkable materials are available as:

tubular sleeves; wraparound sleeves with either separate or attached closure; tapes;

- pre-shaped materials.

3.3 complementary materials

3.3.1 primer

Material applied (generally in a liquid form) as a thin film over a prepared metal surface and the adjacent pipe coating in order to ensure maximum adherence of the subsequent coating material.

3.3.2 Filler

Mouldable material for smoothing out uneven surfaces or cavities (e. g. complicated shapes) to allow for the void-free application of tapes or shrinkable materials.

NOTE: Fillers will be selected by mutual agreement between manufacturer and user.

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EN 12068:1998

3.3.3 additional mechanical protection materials

Various materials to enhance impact and indentation resistance and/or isolate movements between coated pipelines and surrounding soil.

Any additional mechanical protection not completely bonded to the coating below is either perforated or electrical conductive under operating conditions to avoid screening of cathodic protection. .

3.4 repair material

Material used to reconstitute the coating at places where mechanical damage has occured. It may be hot or cold applicable material. Primer(s) and/or filler(s) can be applied prior to repair material if necessary.

3.5 other definitions

3.5.1 maximum continuous operating temperature rmax

Maximum continuous temperature of the medium transported through the buried or immersed coated pipeline.

3.5.2 factory coating (mill coating)

Coating applied to pipe length in a factory or yard before delivery.

4 Classification and designation

4.1 Classification

4.1.1 General

Coatings are classified according to resistance to mechanical damage, operating temperature or special installation conditions.

4.1.2 Mechanical resistance classes

4.1.2.1 General

Coatings are classified according to their mechanical characteristics measured by the following tests (where applicable):

impact resistance; indentation resistance; specific electrical insulation resistance; cathodic disbondment resistance; peel strength layer to layer; peel strength to pipe surface and factory coating.

Coatings shall meet requirements for the following classes as specified in table 1 :

4.1.2.2 Class A

Coating which has a low mechanical resistance.

4.1.2.3 Class В

Coating which has a medium mechanical resistance.

4.1.2.4 Class С

Coating which has a high mechanical resistance.

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EN 12068:1998

Three alternative combinations of requirements are specified for cathodic disbondment resistance, peel strength layer to layer and peel strength to pipe surface and factory coating.

4.1.3 Maximum continuous operating temperature classes

4.1.3.1 General

Coatings are classified according to their maximum continuous operating temperature specified by the following tests (where applicable):

indentation resistance; cathodic disbondment resistance;

- peel strength layer to layer; - peel strength to pipe surface and factory coating;

lap shear strength; - thermal ageing resistance.

Coatings shall meet the requirements for the maximum continuous operating temperature classes as specified in tables 1 and 2.

4.1.3.2 Class 30

In the absence of any specific indication, coatings shall be considered suitable for use at maximum continuous operating temperature Tmax up to 30 °C.

4.1.3.3 Class 50

Coatings in this class shall be suitable for use at maximum continuous operating temperature rmax = 50 °C.

4.1.3.4 Class HT

Coatings in this class shall be suitable for use at maximum continuous operating temperature rmax>50 °C in increments of 10 °C. This temperature shall be stated in brackets.

4.1.4 Classes for special application conditions

4.1.4.1 Class L/Class VL

4.1.4.1.1 General

For these classes of coatings it shall be possible to handle products and the coated pipe at temperatures below -5 °C. They shall meet the requirements specified in table 2.

4.1.4.1.2 class L: for low temperatures between -20 °C and -5 °C.

4.1.4.1.3 class VL: for very low temperatures lower than -20 °C.

In this case, the minimum handling and laying temperature shall be agreed between user and manufacturer. This temperature shall be stated in brackets.

4.1.4.2 Class UV

Coatings in this class shall be suitable for storage for prolonged periods while exposed to sunlight and shall comply with the resistance to ultraviolet irradiation required in table 2.

4.2 Designation

Coatings shall be designated as follows:

EN 12068 - Mechanical resistance class - Maximum continuous operating temperature class - Class for special application conditions (if applicable).

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organische bekleding voor de bescherming tegen corrosie van in de bodem of

in het water gelegde stalen leidingen die samen met kathodische

bescherming worden gebruikt - Wikkelbanden en krimpbare materialen

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